Comparison of 9.5 mm SuperPave and Marshall Wearing I Mixes in ...

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77Hughes, M.S., “Inter Laboratory Variability of the Marshall Test Method for Asphalt Concrete”,West Virginia University, Morgantown, WV., 1999Kandhal, P.S., Foo, K.Y. and Mallick R.B., “Critical Review of Voids in Mineral AggregateRequirements in Superpave”, Transportation Research Record 1609: Paper 98-0223,Washington, DC., 1998Mohammed, L.N., Huang, B. and Cea, M., “Rutting Measurements of HMA Mixtures with theAsphalt Pavement Analyzer”, NAPA Paper No. 01-146, Alburn, AL., 2001Pavement Technology Inc., “Asphalt Pavement Analyzer Automation Guide”, User’s Manual,Conyers, GA.Roberts, F.L., Kandhal, P.S., Brown, E.R., Lee, D. and Kennedy, T.W., Hot Mix Asphalt Materials,Mixture Design and Construction, NAPA Research and Education Foundation, Lanham,MD., 1996Tarefder, R.A. and Zaman, M., “Evaluating Rut Potential of Selected Asphalt Mixes for ImprovedPavement Performance”, NAPA Paper No. 01-162, 2001, Auburn, AL.West Virginia Department of Highways, Standard Specifications, Roads and Bridges, Charleston,WV., 2000Zaniewski, J.P., Superpave Mix Design Workshop, West Virginia University Asphalt TechnologyLaboratory, WVU, Morgantown, WV., 2001Zaniewski, J.P., “Flexible Pavement Design, Construction and Maintenance: Class Notes” WVU,Morgantown, WV., Fall 1999
78APPENDIX A BUCKET MIXER INSTRUCTIONSInstructions outline the correct setup and use of the large bucket mixer used during theSuperpave mix design process and the making of the APA test samples. These instructions havebeen derived from those developed during research performed by Michael S. Hughes (Hughes,1999).MIXER SETUPInstall paddle arm so that it sits parallel to the axis about which the bucket rotates. Securepaddle to paddle arm so that both edges of the paddle sit flush to the side of the bucket andblade touches bottom of bucket.MIXING PROCEDUREHeat 5-gallon bucket and paddle attached to paddle arm in oven set to mixing temperature.Allow sufficient time for bucket and paddle to achieve proper temperature.Remove bucket and paddle from oven, weigh, and add heated aggregate and asphalt.Place bucket in mixer basket.Remove paddle from oven and slide over paddle securing rod.Turn on mixer, this should allow paddle to be pushed down to touch the bottom of thebucket.Unlock mixer from upright position and tilt bucket forward.While holding onto paddle arm, tilt mixer as far as possible being careful not to spillcontents.Rock bucket back and forth to aid in mixing.After the aggregate and asphalt has been thoroughly mixed, lock mixer back into uprightposition.Turn off the mixer.Pull paddle off of securing rod and, with a hot spatula, completely scrape all of the materialoff the paddle into the bucket.Remove bucket from mixer and transfer contents.Scrape the inside of the bucket thoroughly and transfer this material. Weigh bucket andpaddle and continue to remove material until the paddle and bucket weigh within 5 gramsof the original weight.
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COMPARISON OF 9.5 MM SUPERPAVE ANDM
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iNOTICEThe contents of this report
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iiiasphalt concrete wearing courses
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vMixing Procedure 78Appendix B Fine
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viiTable C-7 Marshall Medium 13% NS
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4Table 1.1 Mix Design Types in Expe
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6CHAPTER 2 LITERATURE REVIEW2.1 INT
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82. determine aggregate stockpile b
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10SieveAllowable PercentPassing Sie
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12Stability is recorded as the maxi
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14The WVDOH procedure for determini
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16sieve. This is somewhat different
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18G sb = bulk specific gravity of a
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20theoretical gravity at the initia
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22D/B est = adjusted dust to binder
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24P b,est - 0.5%,P b,est ,P b,est +
Page 35 and 36: Percent Passing261009080Superpave U
Page 37 and 38: 28Table 2.6 WVDOH Marshall and Supe
Page 39 and 40: 30Table 2.9 Habib Marshall Analysis
Page 41 and 42: 32theoretically correct in that the
Page 43 and 44: 34the machine. This variability was
Page 45 and 46: 36CHAPTER 3 EQUIPMENT3.1 INTRODUCTI
Page 47 and 48: 38Hose PressureWheel Load100 psi100
Page 49 and 50: 40mouth. This jar rests on a holder
Page 51 and 52: problematic, as the saturated surfa
Page 53 and 54: 44Mechanical Laboratory Sieve. Afte
Page 55 and 56: Percent Passing4610090100% Limeston
Page 57 and 58: 48Maximum specific gravity is a req
Page 59 and 60: 50gradation. This allowed for direc
Page 61 and 62: Percent Passing521009080Light 100%
Page 63 and 64: 54percentage of aggregate from the
Page 65 and 66: 56Table 5.4 Summary of Volumetric a
Page 67 and 68: 58Table 5.5 Calculated and Adjusted
Page 69 and 70: 60Table 5.6 Results of APA TestsAir
Page 71 and 72: 62exhibit lower rut depths than any
Page 73 and 74: design had significantly more rutti
Page 75 and 76: 66SP L 100LS SP L 64NS -10.335 2.77
Page 77 and 78: 68percent air voids and percent lim
Page 79 and 80: Air Voids (%)Uncompacted Voids (%)7
Page 81 and 82: 72than the Marshall mixes. Table 6.
Page 83 and 84: Voids in the Mineral Aggregate. As
Page 85: 76REFERENCESAmerican Association of
Page 89 and 90: 80APPENDIX B FINE AGGREGATE ANGULAR
Page 91 and 92: 82Table B-3 Uncompacted Void Conten
Page 93 and 94: 84AGGREGATE DESIGN DATATable C-1 St
Page 95 and 96: 86Table C-3 Computed Blend Gradatio
Page 97 and 98: 88Table C-7 Marshall Medium 13% NS
Page 99 and 100: 90%G mm%AC VMA VTM VFA @ N ini @N d
Page 101 and 102: 92Table C-14 Superpave Light 64% NS
Page 103: 946 2979.3 1696.7 2988.1 2.307 7.09
Page 106 and 107: 971 2912.7 1620.8 2917.9 2.246 7.65
Page 108 and 109: 992 8.40 10.80 7.402 7.90 9.90 7.80
Page 110 and 111: 1011 9.50 6.90 11.502 9.79 7.15 10.
Page 112 and 113: 1032 8.55 5.20 5.95L R RDate Tested
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